Is our society in moral decline?

We're in moral decline: this is an idea that I've frequently come across in what other people have said, but never gave any serious attention to. 

This is the idea that our society is displaying a trend, where it is becoming more and more open to values and ideas that we've in the past deemed immoral and inappropriate: 

• Being open about one's homosexuality,
• Legalisation of marijuana,
• Increased acceptance to inter-racial relationships and relationships with huge age disparities,
• The public discussion of sex and related topics considered less of a taboo,
• Break down of social hierarchy between rich and poor, old and young

... and perhaps many more others. (None of these phenomena are absolutely global, but are definitely evident in some societies) 

As far as I'm concerned, these 'trends' do not exactly overwhelm me either positively or negatively. I have a feeling that I have, more than many others who are concerned about this moral decline, a better understanding of what morality really is (in a sort of meta-ethics context). (See here and here)

Morality is akin to emotions and bodily feelings: my opinion is that as best practice, we shouldn't let our feelings of morality affect our judgement any more than we shouldn't let our feelings of hunger or lust affect our actions. 

Moral decline or not - for me, that doesn't seem to be a huge issue to fuss over. What's probably worth spending more time on is to analysing the material and (socio-)psychological consequences of these 'moral' trends, and acting to make the best of what could and probably will happen.